Roll out stand

ABSTRACT

The roll out stand for a paperboard corrugator is an L-shaped vehicle which eliminates the need for manually pushing rolls into position for elevation by arms on the vehicle.

United States Patent [191 Osgood {451 Feb. 27, 1973 ROLL OUT STAND [56] References Cited [75] Inventor: John H. Osgood, Cherry Hill, NJ. UNITED STATES PATENTS [73] Assignee: Harris-Intertype Corporation, 3,276,711 10/1966 Martin 242/585 Cleveland Ohio 2,714,996 8/1955 Stroehman .....242/58.6 2,075,192 3/1937 George ..242/58.6 [22] Filed: Nov. 22, 1971 Primary Examiner-George F. Mautz [21] Appl' 200942 Assistant Examiner-Edward J. McCarthy Attorney-Arthur H. Seidel et al. [52] US. Cl ..242/58.6

[57] ABSTRACT 51 Int. Cl. ..B65h 19/30 The a Paperbwd is shaped vehicle which eliminates the need for manually pushing rolls into position for elevation by arms on the [58] Field of Search ..242/58.6, 58.2, 79, 85, 86.5, which 19 Claims, 10 Drawing Figures 3718.299 SHEET 10F 4 PATH- TED FEB271375 PATENTEDFEBZ? ms SHEET 2 of 4 PATENT FEB2 71373 SHEET 3 OF 4 PATENTEIJFEBNISH SHEET u or 4 x O Q Nm mm. mm w M IW 1 .3 \m v B 30V R v& NW mm mm am E H m] u 6C 7 ROLL OUT STAND This invention relates to roll handling apparatus which is generally referred to in the trade as a roll out stand. The roll out stand is a wheeled vehicle which has a pair of arms for lifting up rolls of paper or webbed material and supports the same during unwinding. A typical unwind stand is disclosed in US. Pat. No. 3,276,711. When a roll is completely or partially unwound, and it is desired to position a new roll in the corrugator, the vehicle with the old roll or core is caused to move to a roll storage position alongside the corrugator wherein the old core or roll is deposited. Then a new roll is supported by arms on the vehicle. Then the vehicle is moved into line with the rest of the corrugator.

When using a vehicle such as that shown in US. Pat. No. 3,276,711, the minimum space between rolls in the roll storage location is in excess of the width of the vehicle. When the vehicle in said patent is opposite the new roll in the storage location, then the new roll must be manually pushed to a position between the lift arms.

This invention provides several advantages which flow from the construction of the roll out stand. The roll out stand of the present invention includes a vehicle which is L-shaped with the narrow long leg thereof adapted to move between rolls. The construction of the roll out stand of the present invention permits the rolls in the storage area to be closer together for more efficient use of the storage area. Further, the present invention, due to the construction of the roll out stand, reduces the need for manually pushing the new roll into a position where it may be supported by arms on the vehicle. This feature is significant when it is considered that the rolls weigh from 3-5 tons. The last-mentioned advantage results in the fact that the vehicle can now be closer to the roll.

The roll out stand of the present invention has an L- shaped body defined by a narrow portion and a wide portion. The narrow portion is substantially longer than the wide portion. A first pair of wheels supports the narrow portion with a second pair of wheels supporting the wide portion. The first pair of wheels is substantially closer together as compared with the wheels of the second pair.

The vehicle body is provided with a motor means coupled to some of said wheels for driving the same. I

The first and second arms are attached to a shaft pivotably supported by the body along the narrow portion of the body. The body is also provided with a motor means for selectively moving at least the first arm along the shaft toward and away from the second arm. An operator support and control panel are provided on the end of the narrow portion of the body remote from the wide portion.

Since only the long narrow portion of the body will be between a pair of rolls when picking up a roll or when depositing a core, the vehicle. body may be positioned much closer to the new roll so as to reduce the need for manual pushing of the new roll. The arms are preferably pivotable through an arc of about 105 to each side of the vertical. ln this manner, the stand may be used to pick up and deposit rolls on either side. It is within the scope of the invention to have arms which only pivot through a total are of about 105 whereby it can only pick up and deliver rolls on one side.

It is an object of the present invention to provide a novel roll out stand.

It is another object of the present invention to provide a corrugator roll out stand which includes an L- shaped body with the narrow portion being substantially longer than the wide portion of the body.

It is another object of the present invention to provide a roll out stand which may be manipulated to a position closer to a roll whereby the roll may be picked up without manually moving the roll after the vehicle is in its pick-up position.

It is another object of the present invention to provide a roll out stand which is structurally interrelated in a manner which is simple, easy to construct, easy to operate, and reliable for the purpose for which it is intended.

Other objects will appear hereinafter.

For the purpose of illustrating the invention, there is shown in the drawings a form which is presently preferred; it being understood, however, that this invention is not limited to the precise arrangements and instrumentalities shown.

FIG. 1 is a side elevation view of the roll out stand of the present invention.

FIG. 2 is a top plan view of the roll out stand shown in FIG. 1.

FIG. 3 is an end view of the roll out stand along the line 3-3 in FIG. 1.

FIG. 4 is an end view of the roll out stand along the line 4-4 in FIG. 1.

FIG. 5 is an enlarged detail elevation view, partly in section, at the righthand end of FIG. 1.

FIG. 6 is a sectional view taken along the line 66 in FIG. 5.

FIG. 7 is a sectional view taken along the line 7-7 in FIG. 5.

FIG. 8 is a sectional view taken along the line 8-8 in FIG. 5.

FIG. 9 is a schematic hydraulic diagram.

FIG. 10 is an elevation of the cam.

Referring to the drawing in detail, wherein like numerals indicate like elements, there is shown in FIG. 1 a roll out stand in accordance with the present invention designated generally as 10. The roll out stand includes a rigid L-shaped body having a wide portion 12 and a narrow portion 14. The length of the narrow portion 14 is substantially greater than the width and length of the wide portion 12.

The lefthand end of the narrow portion 14 is supported by a first pair of wheels 16. The wide portion 12 of the L-shaped body is supported by a second pair of wheels 18. The wheels 16 are closer together than the wheels 18 as will be pointed out in greater detail hereinafter.

At the lefthand end of the narrow portion 14 of the L-shaped body, there is provided a control unit 20 to be operated manually by an operator while standing on an operator support platform 22. Suitable guard rails are provided for the operator. A shaft 24 is rotatably supported at its ends. The lefthand end of shaft 24 in FIG. 1 is rotatably supported by bearings within the control unit 20. The righthand end of shaft 24 is rotatably supported by bearings at the wide portion 12 as shown more clearly in FIG. 5 and to be described in greater detail hereinafter. Shaft 24 constitutes the major structural member which spatially interconnects portion 12 with unit 20. A shallow tray or hollow conduit 15 for wires and the like extends between portion 12 and unit 20 below shaft 24. If desired, shaft 24 could be a tube and the wires and the like could extend through shaft 24.

Roll supporting and lifting arms 26 and 30 are mounted on the shaft 24 for rotation therewith. Arm 26 at its terminal end is provided with a conically shaped chuck 28 mounted on a spindle having a tension brake 27. Chuck 28 is adapted to enter the core opening of a roll of paper or other sheet material.

Arm 30 at its terminal end is provided with a similar chuck-32 mounted on a spindle having a tension brake 31. Arm 26 is fixedly secured to the shaft 24. Arm 30 is mounted for movement along the length of shaft 24 toward and away from arm 26 to facilitate accommodating different lengths of rolls as well as the coupling of the chucks to the roll as will be made clear hereinafter.

In order to accommodate movement of the arm 30 toward and away from the arm 26, the shaft 24 is provided with gibs 34 on opposite sides thereof. See FIG. 8. The mounting bracket for arm 30 is provided with recesses, each receiving one of the gibs 34 as well as a depending journal 36 having an internally threaded nut meshing with the threads on the lead screw shaft 38.

The ends of shaft 38 are supported in a nonreciprocating manner by means of a journal 40. See FIG. 1. Journal 40 is fixedly secured to the bottom surface of shaft 24. A similar journal 41 is provided at the righthand end of shaft 38. See FIG. 5. A hydraulic or other type of motor 42 is supported by the bracket below arm 26 for rotating the shaft 38. Rotation of shaft 38 causes the arm 30 to reciprocate toward and away from the arm 26.

Referring specifically to FIG. 5, the wide portion 12 of the L-shaped body includes an upright sheet metal housing containing therewithin a frame 44. Bearings 46 on the frame 44 rotatably support the shaft 24 for rotation through an arc of about 210; that is, 105 to each side of a vertical plane containing the axis of shaft 24. The bearings 46 couple shaft 24 to frame 44 so that the shaft 24 cannot move axially relative to the frame. Similar bearings are provided in unit 20.

A first cylinder 50 is rotatably supported by the frame 44 for rotation about horizontally disposed stub shaft 52. See FIGS. and 6. Cylinder 50 is provided therewithin with a piston having a piston rod extending downwardly through the bottom head of the cylinder. The piston rod at its lower end is pivotably connected by means of a pin 56 to a pair of spaced ears 54 fixedly secured to the periphery of shaft 24. Cylinder 50 rotates about the axis of stub shaft 52 as the shaft 24 rotates, and vice versa. Conduits 55 and 57 are utilized to introduce a motive fluid, such as a hydraulic liquid into the cylinder 50 to effect reciprocation of the piston therewithin.

A second cylinder 58 is pivotably connected at its lower end to the frame 44 for rotation about the horizontal axis of stub shaft 60. Conduits 59 and 61 are utilized to introduce a similar motive fluid into the cylinder 58. The piston in the cylinder 58 has a piston rod extending through the lower cylinder head and is pivotably connected by means of a horizontal pin 64 to a pair of ears 62. The ears 62 are fixedly secured to the periphery of shaft 24 longitudinally spaced thereon with respect to the cars 54. A cam 68 fixedly secured to the periphery of shaft 24 controls valves 66 and 110 which in turn control the introduction of motive fluid into the cylinders 50 and 58. See FIGS. 9 and 10. Valves 66 and l 10 are supported by the frame 44.

As shown more clearly in FIGS. 2-4, the roll out stand of the present invention has flanged wheels adapted to ride on the floor mounted tracks 70, 72, and 74. Tracks 70 and 72 are utilized by the wheels 16 on the narrow portion of the body. Tracks 70 and 74 are utilized by the wheels 18 on the wide portion 12 of the body. Thus, each pair of wheels has one wheel riding on track 70.

The body of the roll out stand of the present invention is provided with a means to stabilize it and prevent the same from tipping when the arms 26 and 30 project in a cantilevermanner to support a roll. The preferred construction for the antitipping means includes brackets 76 and 76 on opposite sides of the wide portion 12 of the L-shaped body. Each bracket is identical. Hence, only bracket 76 will be described in detail with corresponding primed numerals being provided on bracket 76.

The bracket 76 is rigidly supported by the wide portion of the L-shaped body and projects downwardly into the track alongside rail 70. A pair of rollers 78 is rotatably supported by the lower edge portion of bracket 76 and engages the undersurface of a suitable guide 80 fixedly secured to the floor. Similarly, rollers 78 engage guide 80'. In this manner, tipping forces are resisted regardless of whether the arms 26 and 30 extend to the left or to the right of the narrow portion 14 of the L-shaped body.

In FIG. 9, there is illustrated the schematic hydraulic diagram for a system utilizing solenoid operated valves. The hydraulic system could be manually operated utilizing manually operated valves, if desired. The system is designated as 81 and includes a supply tank 82 for a hydraulic fluid such as a medium to heavy hydraulic oil. Pump 86 in the manifold supply conduit has its inlet communicating with the oil 84 by way of a filter 87. Electric motor 88 operates pump 86. A manifold return conduit 92 communicates with conduit 90 by way of a pressure relief and directional control valve 91 whereby the total output of pump 86 will be immediately transferred to conduit 92 and returned to the tank 82.

A plurality of solenoid operated valves are connected across the manifold supply conduit 90 and manifold return conduit 92. The first such solenoid operated valve is a system dump valve 94 having an inlet conduit 96 and outlet conduit 98. Conduit 96 is connected to manifold return conduit 92. In the position illustrated, the valve 94 is diverting the oil under back pressure from conduit 90 to conduit 92. Valve 94 automatically assumes this position when none of the other solenoid operated valves are in a flow transmission position. When any of the other solenoid operated valves are in a flow transmission position, valve 94 is automatically moved to a position wherein flow cannot take place between conduits 96 and 98.

A solenoid operated valve 100 has an inlet conduit 102 connected to the manifold supply conduit 90. The outlet conduit 108 from valve 100 is connected to conduit 92. Conduits 102 and 108 may be connected, by way of valve 100, to either of conduits 104 and 106.

Conduit 104 is connected to each of conduits 57 and 61. Conduit 106 is connected to each of conduits 55 and 59 (see FIGS. 6 and 7).

Conduit 57 contains a cam operated valve 1 10 and a correlated check valve 112. Valve 112 is correlated with respect to the pressure in conduit 55. Normally, valve 112 prevents fluid from flowing in a direction away from cylinder 50. Whenever the pressure in conduit 55 is at a predetermined ratio with the pressure in cylinder 50, valve 112 opens so as to relieve the pressure beneath the piston in cylinder 50.

Conduit 61 is provided with a valve 66 comparable to valve 110. Conduit 61 is also provided with a check valve 116 comparable to check valve 112. In the position shown, valve 110 permits flow from conduit 104 through conduit 57 and permits flow from conduit 106 through conduit 55. When activated by the cam 68, valve 110 may move to a position wherein conduit 104 communicates with conduit 55 by way of a portion of conduit 57. At the same time, conduit 57 communicates with conduit 106 by way of a portion of conduit 55. Valve 66 operates in a comparable manner to that of valve 110.

Valve 118 has an inlet conduit 120 connected to the manifold supply conduit 90 and an outlet conduit 126 connected to the manifold return conduit 92. The motive fluid may be transmitted by way of valve 118 from conduit 120 to either side of the hydraulic motor 125 to control the direction of rotation thereof by way of conduits 122 and 124. Motor 125 is connected to the wheels 18 and is utilized to cause the roll out stand 10 to move along the rails 70, 72 and 74.

Valve 118 is in a neutral position as illustrated. When the valve 1 18 is moved downwardly, conduit 120 communicates with conduit 124 and conduit 122 communicates with conduit 126. When the valve 118 moves upwardly from its neutral position, conduits 120 and 122 communicate with each other and conduits 124 and 126 communicate with each other.

. Solenoid operated valve 128 has an inlet conduit 130 communicating with the manifold supply conduit 90 and an outlet conduit 136 communicating with the manifold return conduit 92. Valve 128 controls the flow of motive fluid to the hydraulic motor 42 by way of conduits 132 and 134. In the neutral position shown in FIG. 9, there is no flow through valve 128. When moved downwardly, the valve 128 communicates conduit 130 with conduit 134 and conduit 132 with conduit 136. When valve 128 is moved upwardly, conduit 130 communicates with conduit 132 and conduit 134 communicates with conduit 136. In this manner, valve 128 is utilized to operate the motor 42 in opposite directions so that the arm 30 may be caused to reciprocate along the shaft 24.

The manifold supply conduit 90 may be tapped in any desired location so as to provide a needle valve 138 controlling flow through a gauge snubber 140 and gauge 142 so that the pressure may be read. A system safety bypass valve may be provided anywhere between the conduits 90 and 92 and set at a pressure lower than the bypass pressure required to operate valve 91. Wherever desired, flexible conduits may be utilized. For example, portions of conduits 55, 57, 59 and 61 are flexible so as to accommodate movement of the cylinders 50 and 58.

The operation of the present invention is as follows:

An operator standing on support 22 manipulates the control buttons on the control unit 20 to turn on motor 88 and operate valve 118 whereby motor 125 moves the roll out stand 10 along the tracks 70, 72, 74 from right to left in FIG. 2, whereby the narrow portion 14 of the L-shaped body is disposed between rolls A and B in the roll storage area alongside the corrugator. Because of the narrow width of portion 14, rolls A and B may be closer together as compared with prior art roll out stands. During such movement, the arms 26 and 28 are in an upright position as shown in FIG. 3.

Arms 26 and 30 may be manipulated to either side for picking up and carrying either roll A or roll B. For purposes of illustration,. let it be assumed that it is desired to pick up roll A.

The operator stops the roll out stand 10 opposite roll A. Valve 128 is operated so as to cause motor 42 to move arm 30 away from arm 26 by a sufficient distance so that the space between the chucks 28 and 32 is greater than the length of the roll A. Thereafter, valve is manipulated to cause the piston and cylinder 58 to move downwardly from the position shown in FIG. 9 and to rotate the shaft 24 to a position wherein the arms 26 and 30 assume the phantom position shown in FIG. 3 at the lefthand side thereof.

As the shaft 24 begins to rotate counterclockwise in FIG. 9, and passes beyond top dead center, the valve 1 10 is manipulated by way of the cam 68 and caused to reverse itself so that the piston in cylinder 50 likewise moves downwardly and assists the piston in cylinder 58 in rotating the shaft 24. When the pistons have reached the end of their stroke, the arm 30 and the arm 26 will be in the phantom position at the lefthand side of FIG. 3. Of course, the operator may manipulate the appropriate solenoid for valve 100 to stop the rotation of the shaft 24 where desired so that the chucks 28 and 32 will be generally opposite the core opening C in the roll A.

Thereafter, the valve 128 will be operated in the opposite direction to cause the motor 42 to reciprocate the arm 30 toward the arm 26 until each of the chucks 28 and 32 extends into the core opening C. Thereafter, the reverse of the above sequence of events will cause the arms 26 and 30 to raise the roll A from the position shown at the lefthand side of FIG. 310 the upright position of the arms as shown in FIG. 1. Thereafter, valve 118 is manipulated so as to cause motor 125 to operate in a reverse direction moving the body and the roll A to a position in line with the corrugator so that the paper or other sheet material wound into the roll A may be unwound and processed.

The pistons in the cylinders 50 and 58 cooperate with each other to push or pull on the ears to effect rotation of the shaft 24. The axes of pivotable movement for the cylinders 50 and 58 are on opposite sides of a vertical plane containing the axis of shaft 24, although the axis of rotation of cylinder 50 is closer to said plane. When the arms are lifting a roll and rotating the shaft 24 counterclockwise in FIG. 9, initially both pistons in the cylinders 50 and 58 pull upwardly. As the ears approach the top dead center position or cylinder 50, valve is operated by the cam 68 so as to redirect pressurized fluid from conduit 57 to conduit 56 thereby reversing the cylinder motion. The cylinder 58 continues to rotate the shaft 24 over top dead center. When cars 62 approach the top dead center position of cylinder 58, valve 66 operates in the same manner as valve 110. At this time, the arms 26 and 30 are vertically disposed and both cylinders are in a mode to effect lowering of the arms.

The piston in cylinder 58 assists the piston in cylinder 50 in pushing on the ears to effect rotation of the shaft 24 and lowering of the arms. Thus, when the cars 54 and 62 are both disposed to one side of top dead center, the respective pistons and cylinders operate in unison to push or pull on the ears to effect rotation of shaft 24. As the ears are adjacent top dead center, only one of the cylinders is operating to push or pull on its respective ears depending upon the direction of rotation of shaft 24.

When the unwind stand is properly positioned in the corrugator, tension brakes 27 and 31 facilitate unwinding the roll A in a conventional manner. While the preferred embodiment for selectively rotating shaft 24 through an arc of about 105 for lifting a roll on one side and through a total of 210 when lifting the rolls on either side thereof, utilizes a plurality of cylinders as shown, other equivalent means may be utilized. For example, the motor means for selectively rotating shaft 24 could include a worm wheel thereon driven by a hydraulic motor.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof and, accordingly, reference should be made to the appended claims, rather than to the foregoing specification as indicating the scope of the invention.

I claim:

1. A roll out stand for carrying a roll of material comprising an L-shaped body having a narrow portion and a wide portion, said narrow portion being substantially longer than the length of said wide portion, a first pair of wheels supporting said narrow portion, a second pair of wheels supporting said wide portion, said first pair of wheels being closer together than said second pair of wheels, first motor means on said body for selectively driving at least one of said wheels to cause the body to move, first and second spaced apart roll support arms supported along said narrow portion for rotation in unison about a horizontal axis parallel to said narrow portion, a second motor means on said body for selectively moving said first arm along said narrow portion towards and away from said second arm, and control means for selectively controlling each of said motor means.

2. A roll out stand in accordance with claim 1 including an operator support on said body.

3. A roll out stand in accordance with claim 2 wherein said control means is on the body adjacent said support.

4. A roll out stand in accordance with claim 1 wherein said control means is located at the end of said narrow portion remote from said wide portion.

5. A roll out stand in accordance with claim 1 wherein one wheel of said first pair of wheels is aligned with one wheel of said second pair of wheels.

6. A roll out stand in accordance with claim 1 wherein said arms are pivotable through an arc of about 105 to each side of a vertical plane containing the axis of rotation of said arms.

7. A roll out stand in accordance with claim 1 including means on said body for preventing said body from tipping due to the weight of the roll supported by said arms.

8. A roll out stand in accordance with claim 1 wherein said narrow portion includes a shaft rotatably supported by said body, said arms being mounted on said shaft for rotation therewith, and third motor means on said body for selectively rotating said shaft about its longitudinal axis, said second motor means moving said first arm along guides on said shaft.

9. A roll out stand in accordance with claim 8 wherein said third motor means includes first and second pivotably mounted cylinders each having a piston rod pivotably coupled to said shaft for rotating said shaft through an arc of about l 10 from a vertical plane containing the axis of said shaft.

10. A roll out stand in accordance with claim 1 including first, second and third rails, the first pair of wheels riding on said first and second rails, the second pair of wheels riding on said first and third rails.

11. A roll out stand for carrying a roll of material comprising an L-shaped vehicle body having a narrow portion and a wide portion, said narrow portion being substantially longer than the length of said wide portion, a first pair of wheels supporting said narrow portion, a second pair of wheels supporting said wide portion, first reversible motor means on said body wide portion for driving said second pair of wheels, first and second spaced apart roll support arms supported by a shaft for rotation in unison about a horizontal axis along said narrow portion, second motor means on said body and connected to said first arm for selectively moving said first arm along said narrow portion towards and away from said second arm, third motor means on said body wide portion for rotating said shaft about said axis, an operator support on said body, and control means on said body adjacent said support for controlling each of said motor means.

12. A roll out stand in accordance with claim 11 wherein the wheels of the first pair are closer together than the wheels of the second pair, one wheel of said first pair of wheels being aligned with one wheel of said second pair of wheels.

13. A roll out stand in accordance with claim 11 including means on said body for preventing said body from tipping due to the weight of the roll supported by said arms.

14. A roll out stand in accordance with claim 13 wherein said support and control means are located at the end of said narrow portion remote from said wide portion.

15. A roll out stand in accordance with claim 14 wherein one wheel of said first pair of wheels is aligned with one wheel of said second pair of wheels.

16. A roll out stand in accordance with claim 15 wherein said arms are pivotable through an arc of about to each side of a vertical plane containing the axis of rotation of said arms.

17. A roll out stand in accordance with claim 15 including first, second and third rails, the first pair of wheels riding on said first and second rails, the second pair of wheels riding on said first and third rails.

18. A roll out stand inaccordance with claim 17 wherein said third motor means includes first and 

1. A roll out stand for carrying a roll of material comprising an L-shaped body having a narrow portion and a wide portion, said narrow portion being substantially longer than the length of said wide portion, a first pair of wheels supporting said narrow portion, a second pair of wheels supporting said wide portion, said first pair of wheels being closer together than said second pair of wheels, first motor means on said body for selectively driving at least one of said wheels to cause the body to move, first and second spaced apart roll support arms supported along said narrow portion for rotation in unison about a horizontal axis parallel to said narrow portion, a second motor means on said body for selectively moving said first arm along said narrow portion towards and away from said second arm, and control means for selectively controlling each of said motor means.
 2. A roll out stand in accordance with claim 1 including an operator support on said body.
 3. A roll out stand in accordance with claim 2 wherein said control means is on the body adjacent said support.
 4. A roll out stand in accordance with claim 1 wherein said control means is located at the end of said narrow portion remote from said wide portion.
 5. A roll out stand in accordance with claim 1 wherein one wheel of said first pair of wheels is aligned with one wheel of said second pair of wheels.
 6. A roll out stand in accordance with claim 1 wherein said arms are pivotable through an arc of about 105* to each side of a vertical Plane containing the axis of rotation of said arms.
 7. A roll out stand in accordance with claim 1 including means on said body for preventing said body from tipping due to the weight of the roll supported by said arms.
 8. A roll out stand in accordance with claim 1 wherein said narrow portion includes a shaft rotatably supported by said body, said arms being mounted on said shaft for rotation therewith, and third motor means on said body for selectively rotating said shaft about its longitudinal axis, said second motor means moving said first arm along guides on said shaft.
 9. A roll out stand in accordance with claim 8 wherein said third motor means includes first and second pivotably mounted cylinders each having a piston rod pivotably coupled to said shaft for rotating said shaft through an arc of about 90*-110* from a vertical plane containing the axis of said shaft.
 10. A roll out stand in accordance with claim 1 including first, second and third rails, the first pair of wheels riding on said first and second rails, the second pair of wheels riding on said first and third rails.
 11. A roll out stand for carrying a roll of material comprising an L-shaped vehicle body having a narrow portion and a wide portion, said narrow portion being substantially longer than the length of said wide portion, a first pair of wheels supporting said narrow portion, a second pair of wheels supporting said wide portion, first reversible motor means on said body wide portion for driving said second pair of wheels, first and second spaced apart roll support arms supported by a shaft for rotation in unison about a horizontal axis along said narrow portion, second motor means on said body and connected to said first arm for selectively moving said first arm along said narrow portion towards and away from said second arm, third motor means on said body wide portion for rotating said shaft about said axis, an operator support on said body, and control means on said body adjacent said support for controlling each of said motor means.
 12. A roll out stand in accordance with claim 11 wherein the wheels of the first pair are closer together than the wheels of the second pair, one wheel of said first pair of wheels being aligned with one wheel of said second pair of wheels.
 13. A roll out stand in accordance with claim 11 including means on said body for preventing said body from tipping due to the weight of the roll supported by said arms.
 14. A roll out stand in accordance with claim 13 wherein said support and control means are located at the end of said narrow portion remote from said wide portion.
 15. A roll out stand in accordance with claim 14 wherein one wheel of said first pair of wheels is aligned with one wheel of said second pair of wheels.
 16. A roll out stand in accordance with claim 15 wherein said arms are pivotable through an arc of about 105* to each side of a vertical plane containing the axis of rotation of said arms.
 17. A roll out stand in accordance with claim 15 including first, second and third rails, the first pair of wheels riding on said first and second rails, the second pair of wheels riding on said first and third rails.
 18. A roll out stand in accordance with claim 17 wherein said third motor means includes first and second pivotably mounted cylinders each having a piston rod pivotably coupled to said shaft for rotating said shaft through an arc of about 90*-110* to each side of a vertical plane containing the axis of said shaft.
 19. A roll out stand in accordance with claim 11 wherein said shaft constitutes the major structural element interconnecting said wide portion of the body with said control means. 